1config CIFS
2	tristate "CIFS support (advanced network filesystem, SMBFS successor)"
3	depends on INET
4	select NLS
5	select CRYPTO
6	select CRYPTO_MD4
7	select CRYPTO_MD5
8	select CRYPTO_HMAC
9	select CRYPTO_ARC4
10	select CRYPTO_ECB
11	select CRYPTO_DES
12	help
13	  This is the client VFS module for the Common Internet File System
14	  (CIFS) protocol which is the successor to the Server Message Block
15	  (SMB) protocol, the native file sharing mechanism for most early
16	  PC operating systems.  The CIFS protocol is fully supported by
17	  file servers such as Windows 2000 (including Windows 2003, NT 4
18	  and Windows XP) as well by Samba (which provides excellent CIFS
19	  server support for Linux and many other operating systems). Limited
20	  support for OS/2 and Windows ME and similar servers is provided as
21	  well.
22
23	  The cifs module provides an advanced network file system
24	  client for mounting to CIFS compliant servers.  It includes
25	  support for DFS (hierarchical name space), secure per-user
26	  session establishment via Kerberos or NTLM or NTLMv2,
27	  safe distributed caching (oplock), optional packet
28	  signing, Unicode and other internationalization improvements.
29	  If you need to mount to Samba or Windows from this machine, say Y.
30
31config CIFS_STATS
32        bool "CIFS statistics"
33        depends on CIFS
34        help
35          Enabling this option will cause statistics for each server share
36	  mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
37
38config CIFS_STATS2
39	bool "Extended statistics"
40	depends on CIFS_STATS
41	help
42	  Enabling this option will allow more detailed statistics on SMB
43	  request timing to be displayed in /proc/fs/cifs/DebugData and also
44	  allow optional logging of slow responses to dmesg (depending on the
45	  value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
46	  These additional statistics may have a minor effect on performance
47	  and memory utilization.
48
49	  Unless you are a developer or are doing network performance analysis
50	  or tuning, say N.
51
52config CIFS_WEAK_PW_HASH
53	bool "Support legacy servers which use weaker LANMAN security"
54	depends on CIFS
55	help
56	  Modern CIFS servers including Samba and most Windows versions
57	  (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
58	  security mechanisms. These hash the password more securely
59	  than the mechanisms used in the older LANMAN version of the
60	  SMB protocol but LANMAN based authentication is needed to
61	  establish sessions with some old SMB servers.
62
63	  Enabling this option allows the cifs module to mount to older
64	  LANMAN based servers such as OS/2 and Windows 95, but such
65	  mounts may be less secure than mounts using NTLM or more recent
66	  security mechanisms if you are on a public network.  Unless you
67	  have a need to access old SMB servers (and are on a private
68	  network) you probably want to say N.  Even if this support
69	  is enabled in the kernel build, LANMAN authentication will not be
70	  used automatically. At runtime LANMAN mounts are disabled but
71	  can be set to required (or optional) either in
72	  /proc/fs/cifs (see fs/cifs/README for more detail) or via an
73	  option on the mount command. This support is disabled by
74	  default in order to reduce the possibility of a downgrade
75	  attack.
76
77	  If unsure, say N.
78
79config CIFS_UPCALL
80	bool "Kerberos/SPNEGO advanced session setup"
81	depends on CIFS && KEYS
82	select DNS_RESOLVER
83	help
84	  Enables an upcall mechanism for CIFS which accesses userspace helper
85	  utilities to provide SPNEGO packaged (RFC 4178) Kerberos tickets
86	  which are needed to mount to certain secure servers (for which more
87	  secure Kerberos authentication is required). If unsure, say N.
88
89config CIFS_XATTR
90        bool "CIFS extended attributes"
91        depends on CIFS
92        help
93          Extended attributes are name:value pairs associated with inodes by
94          the kernel or by users (see the attr(5) manual page, or visit
95          <http://acl.bestbits.at/> for details).  CIFS maps the name of
96          extended attributes beginning with the user namespace prefix
97          to SMB/CIFS EAs. EAs are stored on Windows servers without the
98          user namespace prefix, but their names are seen by Linux cifs clients
99          prefaced by the user namespace prefix. The system namespace
100          (used by some filesystems to store ACLs) is not supported at
101          this time.
102
103          If unsure, say N.
104
105config CIFS_POSIX
106        bool "CIFS POSIX Extensions"
107        depends on CIFS_XATTR
108        help
109          Enabling this option will cause the cifs client to attempt to
110	  negotiate a newer dialect with servers, such as Samba 3.0.5
111	  or later, that optionally can handle more POSIX like (rather
112	  than Windows like) file behavior.  It also enables
113	  support for POSIX ACLs (getfacl and setfacl) to servers
114	  (such as Samba 3.10 and later) which can negotiate
115	  CIFS POSIX ACL support.  If unsure, say N.
116
117config CIFS_DEBUG2
118	bool "Enable additional CIFS debugging routines"
119	depends on CIFS
120	help
121	   Enabling this option adds a few more debugging routines
122	   to the cifs code which slightly increases the size of
123	   the cifs module and can cause additional logging of debug
124	   messages in some error paths, slowing performance. This
125	   option can be turned off unless you are debugging
126	   cifs problems.  If unsure, say N.
127
128config CIFS_DFS_UPCALL
129	  bool "DFS feature support"
130	  depends on CIFS && KEYS
131	  select DNS_RESOLVER
132	  help
133	    Distributed File System (DFS) support is used to access shares
134	    transparently in an enterprise name space, even if the share
135	    moves to a different server.  This feature also enables
136	    an upcall mechanism for CIFS which contacts userspace helper
137	    utilities to provide server name resolution (host names to
138	    IP addresses) which is needed for implicit mounts of DFS junction
139	    points. If unsure, say N.
140
141config CIFS_FSCACHE
142	  bool "Provide CIFS client caching support"
143	  depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
144	  help
145	    Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
146	    to be cached locally on disk through the general filesystem cache
147	    manager. If unsure, say N.
148
149config CIFS_ACL
150	  bool "Provide CIFS ACL support"
151	  depends on CIFS_XATTR && KEYS
152	  help
153	    Allows to fetch CIFS/NTFS ACL from the server.  The DACL blob
154	    is handed over to the application/caller.
155
156config CIFS_NFSD_EXPORT
157	  bool "Allow nfsd to export CIFS file system (EXPERIMENTAL)"
158	  depends on CIFS && EXPERIMENTAL && BROKEN
159	  help
160	   Allows NFS server to export a CIFS mounted share (nfsd over cifs)
161